<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=420243
-->
<head>
  <title>Test for Bug 420243</title>
  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=420243">Mozilla Bug 420243</a>
<p id="display"></p>
<div id="content" style="display: none"></div>

<iframe id="svg" src="getSubStringLength-helper.svg"></iframe>

<pre id="test">
<script class="testbody" type="application/javascript">
SimpleTest.waitForExplicitFinish();

function runTests(text, charWidth)
{
  function chars(n) { return charWidth * n; }

  function expectThrow(charnum, nchars)
  {
    try
    {
      text.getSubStringLength(charnum, nchars);
      ok(false,
         "text.getSubStringLength(" + charnum + "," + nchars + ") " +
         "should have thrown");
    }
    catch (e)
    {
      is(e.name, "IndexSizeError",
         "expected an index error for " +
         "text.getSubStringLength(" + charnum + "," + nchars + ")");
      is(e.code, DOMException.INDEX_SIZE_ERR,
         "expected an index error for " +
         "text.getSubStringLength(" + charnum + "," + nchars + ")");
    }
  }
  
  function expectValue(charnum, nchars, expected)
  {
    try
    {
      is(text.getSubStringLength(charnum, nchars), expected,
         "text.getSubStringLength(" + charnum + "," + nchars + ") " +
         "returned wrong value");
    }
    catch (e)
    {
      ok(false,
         "unexpected exception for " +
         "text.getSubStringLength(" + charnum + "," + nchars + ")");
    }
  }

  expectThrow(100, 2);
  expectThrow(100, 0);
  expectThrow(3, 0);
  expectThrow(3, 1);

  expectValue(1, 3, chars(2));
  expectValue(0, 4, chars(3));
  expectValue(0, 0, chars(0));
  expectValue(1, 0, chars(0));
  expectValue(2, 0, chars(0));
  expectValue(0, 1, chars(1));
  expectValue(1, 1, chars(1));
  expectValue(2, 1, chars(1));
  expectValue(0, 2, chars(2));
  expectValue(1, 2, chars(2));
  expectValue(0, 3, chars(3));
  expectValue(1, 100, chars(2));
  expectValue(2, 100, chars(1));
}


function run()
{
  try
  {
    var document = $("svg").contentWindow.document;
    var text = document.getElementById("text");

    runTests(text, text.getSubStringLength(0, 1));
  }
  catch (e)
  {
    ok(false, "threw error: " + e);
  }

  SimpleTest.finish();
}

window.addEventListener("load", run, false);
</script>
</pre>
</body>
</html>
